Digester-cover.



y n PATENTBD MAY' 14"., 1907. G. D. HUNTINGTON, A. N. o'NEILL N P. P. NooNE.

.d l/ l l l I l I x Il. j... .l lllllll -|.,7/////////// ,ab 3900809590 VD'IGrES'IER COVER.

APPLICATION FILED JAN. 4. 1907.

1N x\\\\\\\\\\\\\\\\\\\\\\\\y B Y m A TTOHNE Y .11H5 NoRRls PEERs ca., wAsHrNa-ralv. n. c.

. W/TNESSES UNrrEn srArEs PATENT OEEIOE.

GEORGE DANFORTH HUNTINGTON, OF YVATERTOWN, AND ALEXANDER R.

ONEILL AND FRANCIS P. NOONE, OF POTSDAM,

NEw YORK, AssieNoRs TO RAQUETTE FOUNDRY 8L SUPPLY COMPANY, OF POTSDAM, NEW YORK.

DlGESTER-COVER.

Specification of Letters Patent.

Patented May 14, 1907.

Application filed January 4,1907. Serial No. 350,711.

To all wht/nt 7115 www concern; Be it known that we, GEORGE DANFOETI-r HUNTINGTON, a resident of Watertown, in the county of Jefferson and State of New York, and ALEXANDER R. ONEILL and FRAN- cIs P. NOONE, residents of Potsdam, in the county of St. Lawrence and State of New York, all citizens of the United States, have invented a new and Improved Y Digester- Cover, of which the following is a full, clear. and exact description.

The invention relates to apparatus for making paper by the sulfite process, and the object of the invention is to provide a new and improved cover or door for the acid tanks or sulflte digesters, and arranged to present a jointless surface to the acid in the tank, with a view to prevent quick destruction or deterioration of the cover body by the action of the acid contained in the tank.

The invention consists of novel features and parts and combinations of the same,

which will be more fully described hereinafi ter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is an enlarged sectional side elevation of the improvement; Fig. 2 is a perspective view of the strainer, and Fig. 3 is a sectional side elevation of the cover provided. with a strainer integral with the lining.

The body A of the cover or door for the acid tank of an apparatus for making paper by the sulfite process is made of steel, iron or like material, and is covered at its inner face by a One-piece lining B of bronze, lead or other acid proof material, the lining being provided with integral stud bolts O passing through apertures in the body A to the outside thereof, to permit of screwing the nuts C of the said bolts O against the outer face of the body A to securely fasten the lining in position on the inner face of the body and without breaking the continuity of the inner or exposed surface of the lining B, as will be readily understood by reference to Fig. l. The body A is provided with one or more openings A into which the lining is extended 'to form an integral bushing B terminating at its outer end in an annular flange B2 fitting the outer surface of the body A. The bushing flange B2 is provided with a recess or seat B3 for the reception of a flange D formed on a strainer D extending through the bushing B into the acid tank. The strainer D is preferably of acid proof material, the same as the lining B. A goose neck or other fitting E is bolted or otherwise secured to the bushing flange B2 for connection with a valved pipe line, to carry off the fumes or'gases arising from the sulfite tank closed by the cover.

If desired the strainer may form an integral part of the lining B, as illustrated in Fig. 3, but in this case thev strainer controls the outlet of the fumes by way of the bushing and the valved pipe line above referred to.

From the foregoing it will be seen that none of the parts of the body A are exposed to the deteriorating action ofthe fumes arising from the acid in the tank closed by the cover, and hence long life of the latter is insured.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. A digester cover, comprising a body provided with an opening therethrough, a one-piece lining for the body, said lining having an integral bushing extending through the opening and provided with an inte ral annular fiange for engaging the opposite face of the body, said fiange being recessed around the opening'of the bushing, a strainer extending through the cover and provided with a flange engaging the recess, and means for securing the lining and the strainer to the body.

2. A digester cover, comprising a body provided with an opening therethrough, a

one-piece lining for the body7 said lining having integral stud bolts extending through the bodywhereby to secure the lining thereto, and an integral bushing extending through the opening and provided with an integral names to this specification in the presence of annular ange for engaging the opposite face tWo subscribing Witnesses.

of the body, said flange being recessed GEORGE DANEORTH HUNTINGTON. around the opening of the bushing, a strainer ALEXANDER R. ONEILL. extending through the cover and provided FRANCIS 1,. NOONE. with a Hange engaging the recess, and means Nfitiiesses: for securing the strainer to the body. HORACE N. CLARK,

In testin1onT whereof We have signed our DAVID DoNAG-HUE. 

